Heat exchanger baffle



Oct. 25, 1932. W 5 OGlLVY 1,884,156

HEAT EXCHANGER BAFFLE Filed June 4, 1931 2 Sheets-Sheet l 6 OOO OOO 0080000000030 /5 0000000000 i r 000000 0 l xacooooooo l OOOOQDO l/l /E INVENTOR /f 5. 7 BY Waj e/ Og/ v7 Oct. 25, 1932. w. s. oGlLvY HEAT EXCHANGER BAFFLE Filed June 4, 1931 2 Sheets-Sheet 2 INVENTOR Wol/fer Ggf/Vy RNEY Patented Oct. 25, 19.32

UNITED STATES PATENT OFFICE WALTER S. OGIL'VY, OF ELMHURST, NEW YORK, ABSIGNOR T0 ALGO PRODUCTS, INCOR- PORATED, F NEW YORK, N. Y., A CORPORATION 0F DELAWARE HEAT EXCHANGER IBAFFLE Application led June 4, 1931. Serial No. 541,986.

This invention relates to heat exchangers, particularly those of the tubular type, wherein a baille is employed transversely of the exchanger shell for dividing the interior of the shell into separate compartments. The object of the presentV invention is to provide an improved batlie construction which will embody means for eiecting a liquid tight fit at all points of'contact between its edges and the inner faces of the shell. l

Heretofore, various methods have been employed for effecting a liquid tight contact loetween the edges of baiile plates and the inner faces of the heat exchanger shells in which they have been embodied, but for various reasons none oi such methods have proven entirely satisfactory. Such methods have included: machining the shell to a smooth and accurate iinish in its interior before inserting the bao; providing the interior of the shell with longitudinal grooves into which the edges of the baille were adapted to it; constructing the shell in two separate longitudinal halves having extended flanges, and disposing the bams between the halves oi' the shell and bolting the bailie to the flanges; and welding the baille to the shell or casting the same integral therewith. All of the foregoingmethods have proved either inelicient in that they failed to insure a liquid tight joint or were too expensive for practical use.

The instant invention provides a novel and improved baille which embodies expanding means for effecting an efficient, liquid tight Contact with the exchanger shell, which construction is characterized by simplicity, sturdiness, ease of removability, and low cost omanufacture.

The invention is illustrated inthe accompanying drawings in which Fig. 1 is a longitudinal sectional View, on the line I-I of Fig. 2, of a heat exchangerwithY the baille of the inst-ant invention applied thereto; Fig. 2 is a transverse section on the line II-II of Fig. 1; Fig. 3 is a lan View, partly in section, of the baille o the instant invention onv an enlarged scale; Fig. 4 is a side view of the baille shown in Fig. 3;

Fig. 5 is an end view of the baille shown in Fig. 3 looking to the right; Fig. 6 is a section on the line VI-VI of Fig. 3; Fig. 7 is aplan view, partl in section, of a modified form of baille; ig. 8 is a. section on the line VIII- VIII of Fig. 7; Fig. 9 is a longitudinall section of parts of a heat exchanger with a second modified form of baille apphed thereto, one of the parts showing the aiile with one of its plates removed; Fig. 10 is a section on the line X-X of Fig. 9; and Fig. 11 is a partial transverse section on line xihxr of rig. 9.

The novel heme of the instant invention is adapted to be applied to any ordinary type of heat exchanger. Such an exchanger is illustrated in Fig. 1, and comprises a cylindrical shell 1 having an inlet port 2, and an outlet port 3.' l tube sheet 4 is provided at one end of the shell and an annular channel 5 is disposed adjacent the tube sheet. The channel is provided with an inlet port 6, an outlet port 7, a cover plate 8, and a transverse partition wall 9. ilhe opposite end of the shell 1 is provided with a cover 10. A. plurality of spaced parallel tubes l1 are held by the ytube sheet 4 at one end, and arev provided with a floating tube sheet 12, at their opposite ends, and a doating cover 13. S aced, orificed, transverse, semi-circular ba e plates 14 are provided between the ends of the ltubes on each side of the longitudinal baille, the tubes passing through the orifices. The orifices are of sufficient diameter to provide a clearance around the tubes, also permitting the passa e of liquid therethrough. A transverse ba e plate 14a is provided near the floating end of the tubes, and comprises a complete circulary plate made of a heavier material than the semi-circular baille plates. Tie-rods 15 are secured to the tube sheet at one end, pass through the transverse baille plates 14, and are secured 'to theend plate 14a by nuts 15a. Thimbles 15b are provided on the rods 15 between tlie transverse bailles, and serve to hold said bales in their relative spaced positions. The shell, channel, tube sheets and covers are secured together, and provided with suitable gaskets where necessary in the usual manner, well known in the art.

The longitudinal baille of the instant invention is adapted to be transversely disposed I 69 the llame. `The opposite ends of the plates provided with a slot 22. Openings 146 are provided in the transverse '-baille plate 14a, the yokes 19 extending through said openings. 1

Between the plates 16-16 and near the longitudinal edges of the same, expander bars 23--23 are disposed. The expander bars are of'such thickness as to be easily slidable between the plates 16-16, and are formed on their inner edges with wedge-shaped projections 24. In the preferred embodiment of the invention the projections are formed as integral parts of the expander bars, but in practice they may be formed as separate parts and secured to the expander bar if desired, in any suitable manner. The ends ofthe expander bars, remote from the channel end of the exhanger, are provided with threaded projections 25 which extend through the slots-22 in the yolres 19 being permitted a slight lateral movement therein. Washers 26 are provided on the projections 25 and expander nuts 27 are iitted on the threaded projections adjacent the washers.. Adjacent the inner sides of the expander bars 23 between the plates 16-16 spacers 28 are provided, and adjacent the wedge-shaped projections 24.-, rollers 29 are provided. The roliers 29 are held by bolts 30, which pass therethrough and through the plates 16-16 and which permit rotation of the said rollers. Between the plates 16-16 and adjacent the outer edges of the expanderbars 23, follower strips 31eme disposed, the strips being o such thicmess as to permit their free sliding between said plates. At the outer edges of the strips 3i, strips of packing u32, are disposed, the pacmng comprising a fiber composition or any other well known suitable material. When the bams is inserted within the shell 1, the aching rests between the outer edges of the ollower strips of the bae and the inner of packing 33, similar to the strip 32, is sposed between the ends of the plates 16--16 and the tube sheet 4 in a transverse groove which is provided in said tube sheet adj acent'the end of 16-16 make contact with the innerface ofthe transverse baille late 14a, and when the nuts 15a on the tie-r s 15 are drawn up the longitudinal bale is forced in the direction of the tube sheet 4, thereby compressing the packing strip 33 and eiecting a liquid tight joint with the tube sheet. By tightening the expander nuts 27, the expander bars 23 will be drawn in the direction of the floating tube header, and the wedgeshaped projections 24, bearing against the rollers 29, will cause an outward movement oi the expander bars, together with the follower strips 31, which in turn will press tightly against the packing strips 32 and thus e ect a liquid tight contact between the outer edges of the follower strips and the inner faces of the shell. The pressure against the packing will effect a distortion of the same so that it will be enlarged at its edges and iill the spaces between the ends of the #lates 16 and the inner faces of the shell thus roviding a seal which prevents the passage o liquid into the space between the plates. As aforedescribed the slots 22 ermit a slight lateralv movement of the pro-- jections 24, so that the outward movement of the expander bars will not 4be interferred with. Y

The baffle may be removedtogether with the tubes and tube sheets by simply removing the shell cover 10 and floating cover 13, and then turning the expander nuts 27 in reverse direction, until they make Contact with the floating tube header 12 whereupon the expander bars 23 will be moved in the direction oi' the tube sheet 4, thus relieving the pressure on the packing strips 32, and permitting the tube bundle and baiile to be withdrawn as a unit through the channel end of the shell, the channel and itscover having been, oi course, first removed from the shell. The ex tensions 25 being to the outside of the 'tubes and beyond the end of the shell, the nuts 27 are readily accessible for turning.

In Figs. 7 and 8, there is illustrated a modiied form of bale which is similarly constructed to the form hereinbefore described except that in this instance an expander bar construction is provided on one side only of the baille. The edge of the opposite side of this baille is simply provided with a strip oi' packing 34, to be compressed between said edge of the baflle and the inner side oi the shell, to effect the desired liquid tight connection. The outward pressure against the packing on both sides of the baiie is in this instance afforded by the action of the single expander bar. w

A further modied form oi the invention is illustrated in Figs. 9 to 11 inclusive. Here the baille comprises two flat parallel plates 35-35 which are secured together and held in their spaced relation by spacer collars 36, and rivets 37 which pass through said collars and said plates. A bar 38 is centrally disposed between the plates 35, and expander bars 39 are disposed between said plates oneach side of the bale near the outer edges of the same. The bars 38 and 39 are llt) of such thickne as to permit their free sliding movement between the lates -35. A series of semi-circular note es are formed in the opposite edges of the'bar 38, and a series of semi-circa ar notches 41 are formed in the inner ed es of the expander bars 39, the notches 41 eing sli htly in advance of the notches 40. Expan er links 42 are disposed between the plates 35, on the opposite sides of the bar 38, the respective ends of said links being semi-circular in shape and fitting within the notches 40 and 41. lThe links 42 like the bars 38 and 39 are of such thickness as to slide between plates 35. The end of the bar 38 adjacent the fioating tube sheet 43 is provided with a ta ped portlon 44 into which is fitted a threa ed spindle 45. The spindle 45 is provided with a collar 46 adjacent the inner side of the tube sheet 43. In this instance the tube sheet 43 is provided with a central orifice 47 and the iloatlng cover 13 is formed with an inwardly extendin integral sleeve 49, through which orifice an sleeve the spindle 45'extends. A releasing nut 50 is rovided near the end. of the spindle outsi e of the cover 13 and the end 51 of said spindle is squared. Notches 52 are provided in the outer edges of the expander ars 39. Rows of the spacer collars 36 are provi-ded. near the o'uter ed es of the plates 35-35, passing through sald notches. The expander bars, while' bein permitted free transverse movement, are geld against longitudinal movement by the spacers. At the fixed tube sheet end of the exchanger the plates 35 are secured to the tube sheet by lugs 53 which are secured to the plates by spacer rivets 37 and to the tube sheet by studs 54. A strip of paclrin 55 is disposed between the end of the bamge and the fixed tube sheet to eiect a liquid tight connection. Adjacent the outer edges of the expander bars 39 and between the plates 35-35, follower strips 56 are disposed and between the outer edges of the follower strips and the inner face of lthe exchanger shell, strips of packing 57 are provided. f

in assembling the modified form of balde, the plates 35 are bolted to the fixed tube sheet- 4 as aforedescribed, the strip of packing 55 having been previousl disposed between the end of the baiiie an the fixed tube sheet. The square end of the spindle 45 is then turned and, the collar 46 bearing against the floating tube sheet 43, the bar 38 is moved in the direction of the fixed tube sheet and an outward movement of the expander bars 39 is thereby effected so as to exert pressure on the strips of packing 57 and effect a tight connection between the outer edges of the baffle and the inner wall of the shell. This modified form of baille may be removed from the shell with the tubes and tube sheets as a unit by turning the spindle 45 in reverse direction thereby causing the collar 46 to leave Athe floating tube sheet and the reversin nut 50 to make contact with the floating hea cover and the continued turning of the reversing nut 50 and the spindle effecting the movement of the bar 38 toward the fioating tube sheet thereby relieving the pressure on the packing 55 and permitting the baiile together with the tubes and tube sheets to be wlthdrawn from the shell as a unit through"the channel end of theshell, the channel and its cover and the covers 10 and 13 having been first removed from the shell. y

It will be apparent from the foregoing description that the instant invention provides novel and improved baliles which are simple.

and sturdy of structure and of low cost to manufacture, and which at the same time afford an efficient and reliable means for effect ing fluid tight contacts between their edges and the inner sides of heat exchanger shells. While there has been hereinbefore described specific embodiments of the instantv invention it will be understood that many and various changes and modifications in form and details 4of structure may be made without departing from the spirit of the invention and that all and any such changesA and modifications as fall within the scope of the appended claims are contemplated' as a part of the instant invention.

The invention claimed and desired to be secured by Letters Patent, is:

1. A bame for a heat exchanger shell coinprising a pair of spaced parallel plates; an adjustable member disposed between said plates at one side thereof; means for effecting transverse outward movement of said member with relation to said plates Whensaid 1 baiiie; and means for longitudinally moving said member with relation to said plates.

2. A baiiie for a heat exchanger shell comprising. a pair of spaced parallel plates; a member disposed between said plates adapted upon longitudinal movement with relation to said plates to move outwardly at the sides of said plates to increase the width of the baffle; a yoke at one end of said plates; n, spindle connectedto an end of said member and extending through said yoke; and. a nut engaging said spindle adjacent said voire and adapted when turned to effect the longitudinal movement of said member.

3. A baille for a heat exchanger shell comprising a pair of'parallel plates; means disposedl between said plates holding the sa me in fixed spaced relation; a longitudinal member slidably disposed betiveensaid plates adjacentthe edges of one side of same; a wedge shaped projection disposed on the inner side of said longitudinal member; a roller adjacent said projection secured fc said plates between t-he same; and means for longitudinally moving said member, whereby the engage1 ment of said projections with said rollers will eifect the outward movement of said member, to increase the widthV of said baille.

4.. A heat exchanger apparatus comprising a shell; a plurality of tubes disposed therein; tube sheets connected to the ends of said tubes; a transverse baille near one end of said tubes having orifices formed therein through which the said tubes pass; a longitudinal baille interiorally dividing said shell into compartments between one of said tube` sheets and the transverse baille; tie-rods connecting said transverse baille to said tube sheet; and means on said tie-rods for effecting an adjustment of said transverse baille to'move the same in the direction of the tube sheet to effect a tight connection between the end of said longitudinal baille and said tube sheet.

5. A heat exchanger apparatus comprising a shell; a plurality of tubes disposed therein; tube sheets connected to the ends of said tubes; a transverse baille near one end of said tubes having orifices formed therein through which the said tubes pass; a longitudinal baille interiorally dividing said shell into lcompartments between one of said tube sheets and the transverse baille; tie-rods connecting said transverse baille to said tube sheet; means on said tie-rod for effecting a longitudinal adjustment of said transverse baille to move the samein the direction of said tube sheet to effect a tight connection between the end of said longitudinal baille and said tube'sheet; and means for laterally expanding said baille to eifect a tight connection etween the sides of the same and the inner i ace of the shell.

6. A heat exchanger apparatuscomprising a shell; a plurality of tubes disposed therein; tube sheets connected to the ends of said tubes; a transverse baille near one end of said tubes having orifices formed therein through which said tubes pass; a longitudinal baille interiorlv dividing said shell into compartments between one of said tube sheets and said transverse baille; means for effecting an adjustment of said transverse baille to move the same in the direction of the tube sheet to eilect a tight contact between the end of said longitudinal baille and said tube sheet; an adjustable member operably engaged with said baille adapted when moved in a longitudinal direction to extend laterally outward from said baille to eifet an expansion in tte width of said baille and to effeetl a tight connection between the sides of the baille and the inner face of the shell; and means for longitudinally adjusting said adjustable means.

7. A heat exchanger apparatus comprising a shell; a plurality oi tubes disposed therein; tube sheets connected to the ends of said tubes; a transverse baille near one end of said tubes having orifices formed therein'through which said tubes pass; a. longitudinal baille disposed in said shell dividing the same into compartments and extending from one of said tube sheets to the transverse baille, said longitudinal baille comprising a air of spaced parallel plates and a mem r disposed between said plates adapted upon longitudinal movement with relation thereto, to extend outwardly at the side of said plates to increase the width of the baille and eifect a tight connection between the same and the inner face. of the shell; a yoke secured to the end of said plates adjacent the transverse baille and extending therethrough; a spindle connected to the end of said member and extending through said yoke; and a nut engaging said spindle adjacent said yoke and adapted when turned in one direction to effeet the longitudinal movement of said adjustable member in one direction to effect the outward movement o said member, and adapted when4 turned in the opposite direction to effect the longitudinal movement of said member in the opposite direction.

8. A baille for a heat .exchanger shell comprising a pair of spaced parallel plates; lon'- gitudinal members disposed between said plates at the opposite sides of the same adapted to move laterally with relation to said pla-tes to extend outwardly from the edges thereof to eilect an expansion of the width of the baille; and movable means disposed between said members, means for operating said movable means to control the lateral movement, of said longitudinal members.

9. A baille for a heat exchanger shell comprising a pair of spaced parallel plates; longltudinal members disposed between said plates at the opposite sides thereof adapted for lateral movement with relation to said plates, to extend outwardly from the edges thereof, to effect an expansion of the width of said baille; a member disposed between said plates intermediate the laterally movable members; links connecting said intermediate member and said laterally movable members adapting said intermediate member when movedlongitudinally to eifect the lateral movement of said laterally movable members. l

10. A heat exchanger apparatus comprising a shell; a plurality of tubes disposed therein; tube sheets connected to the ends of said tubes; a baille longitudinally disposed in said shell comprising a pair of parallel plates; means holding said parallel plates -in fixed spaced relation; an adjustable longitudinal member disposed between said plates adapted to move laterally with relation thereto for effecting a tight connection between the baille and the shell; a member disposed within said plates adapted for longitudinal movement with relation thereto; connecting links between the last said member and said laterally movable member, adaptj at least one of said sealin meuse ing the latter to be moved outwardly upon movement of the longitudinally movable member in one direction; means connecting one end of the said plates to the adjacent tube sheet; and means connecting an end of said longitudinahy movable member and the adjacent tube sheet for adjusting said longitudinally movable member Yto actuate said laterally movable member.

1l. A heat exchanger apparatus comprising a shell; a plurality of tubes disposed therein; tube sheets connected at the ends of said tubes; covers for the tube sheets; a bams longitudinally disposed in said shell comprising a pair oparallel plates; means holding said parallel plates in fixed spaced relation; an adjustable longitudinal member disposed between said plates adapted to move laterally with relation thereto for effecting a tight connection between the baille and the shell; a memberl dis sed within said plates adapted for longitu inal movement with relation thereto; connecting'links between the last said member and said laterally movable member adapting the latter to bemoved outwardly upon movement of the' lon 'tudinal member in one direction, one en of said longitudinally movable member collar formed thereon' adjacent said tu sheet, said spindle` passing through said tube along its longitudinal edges to the inner face ofthe shell and at one end to the transverse wall; and adjustable means en 'ngi the opposite end of the baille for vpressing said first end against said transverse wall andfor detachably holding said end in pressed engagement with said wall.

13. In combination with a heat exchanger having a shell, a baille plate disposed within said shell having sealing means positioned alon the edges thereof, a member mounted for ongitudmal movement carried by said baille p ate, means for moving said member, and means engaging said member whereby means is moved laterally upon the longitu inal movement of said member, to effect a seal between said sealing means a"d said shell. v

14. A baille ror comprising a pair of spaced plates, an adjustable member disposed -between said a heat exchanger shelll WALTER S. OGILVY.

being tapped; a spindle fitted in said tap havin a 

